CFM56-7B ENGINE TEST TRAINING MANUAL 发动机测试培训手册(13)

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B. Monitor the fuel flow (WF) and exhaust gas temperature (EGT) carefully. These parameters can help find possible problems and control quality.
C. Do the tests as follows:
(1) Start the engine.
(2) Record the corrected time to MI and peak EGT. Set N1 for the power settings in this test to 5 rpm.
(3) Do the following warm-up procedure:
NOTE: Repeat the warm-up procedure each time the engine is shut down during the test.
(a) Keep the engine at MI for 5 minutes.
(b) Slowly accelerate (one minute) to MC rpm N1, and keep the engine at MC for 5 minutes. Refer to Figure 1302.
(c) Slowly decelerate (one minute) to MI, and keep the engine at MI for 5 minutes. Record the indications at 3 minutes.
(4) Record the oil quantity indication at 5 minutes. See Figure 1303 for correction.
(5) Determine the TO power. Refer to Figure 1302.
NOTE: This test must be done with all customer bleed off and no customer power extraction.
(6) Slowly accelerate to the TO power calculated in paragraph C..(5) and set the throttle stop at that position.
(7) Do a slow deceleration to 15 percent TO power. Refer to Figure 1302. Keep the engine at 15 percent TO power for 6
minutes.
(8) Quickly accelerate (one second) to the throttle stop calculated in paragraph C.(5) to produce a stable TO power N1, and at the same time record the elapsed acceleration time to 95 percent maximum TO power. Refer to Figure 1302. Keep the engine at TO power N1 for 30 seconds, then do a quick deceleration (one second) to MI. Keep the engine at MI for 5 minutes.
Note: The elapsed acceleration time must not be more than 5 seconds. If the acceleration time is more than 5 seconds, do troubleshooting for the cause.
Acceptance Test - 72-00-00-13-003
2011-4-9 CFMI PROPRIETARY INFORMATION : Subject to the restrictions on the Page 2 35
Training Material
CFM56-7B Engine Testing
1. Acceleration Time Check and Acceptance Calibration. Continued...
(9) Accelerate to MC. Keep the engine at MC for 10 minutes to prepare for the acceptance test.
NOTE: The following steady state data points are necessary to complete the acceptance test requirements.
Conduct these data points with a fan speed modifier level of zero.
(10) Record the indications after maintaining the required engine stabilization time shown at each power setting.
(11) Accelerate to TO power. Keep the engine at TO power for a minimum of 5 minutes. Record the indications.
(12) Decelerate to MC power. Keep the engine at MC power for a minimum of 5 minutes. Record the indications.
(13) Slowly decelerate (2 minutes) to AI. Keep the engine at AI for 5 minutes. Record the indications.
(14) Slowly decelerate to MI. Keep the engine at MI for 5 minutes. Record the indications.
(15) Record the oil quantity indication at 5 minutes.
(16)Subtract oil quantity recorded in from oil quantity recorded in C.(4)..
(17) If oil quantity used is out of limits, do the servicing of the engine oil system, then do a simulated flight cycle. Refer to
　
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